Pressure-fed tool.



G. H. GILIVIAN.

PRESSURE FED TOOL. APPLICATloN FILED' MAY15, 1909.

Patented Aug. 17, 1915.

@MM ffm/mma y LA7 "croacia H. entramos LA'HEMONTQNEW HAMPSHIRE,ASSIGNOHBY Mnsnn AssiomyiirnlirTs; To SULLIVAN lMAGHINERY COi/LPANY,4 orBOSTON, MASSACHUSETTS, A

l-I. GILMAN,

- citizen ofthe United States, residing at LState of New Hampshire, haveinvented an Improvement Yin Pressure-Fed Tools, of whichthe. followingldescrip'tion, 1n connectionhwith thegaccompanyin'g drawings, 1s aspecification, like .lettersfonlthe drawings `repijescnting like parts.y l

V,rl `his invention relates to. pressureactul ated tools, v. being moreparticularly con- .cerned with thegprovsion of improved feedingd'eyicesfor such tools. ThejnyentionLwill behest `understood by l referencetothe following .description when passy `bmkenj my,

taken in connection. with ,the accompanying one: speciic embodimentillustration. of`

tisillllrfPointeflut inthe appended Claims- In the drawi`ngsz-gligure1shows inplan, @pressure fed yhammer drill embodying oi forml of myinvention; Fig-2 is a longitudinahj sectional elevation, on anenlaligedscale,-l showing. the controlling valve forthe feedsand the tool and thepassages lea-dingtherefrom; Fig. 3 is a secapneiimaticto tionalelevationont'he line .3-3 in` Fig. 2 lookingfin the directionvof the arrow; Fig.45 is a sectionalrelevation lon the llile in `Fig'. 2looking -inthedirection of the arrow; Aand Fig. 5l is an end viewA of the valvevsleeve with. the handle removed.. "'Referring tot'he' drawings'andltthe embodiment of my yinvention there,` disclosed forA illiistratii'e purposesJ have therel shown ol, herein `of Vthehamnr'er drill type.having the`- cylinder 21,' so connected to suitable pressure-actuatedAceding appara'v tusthat the pressureI fluidfsupplied thereto onlyreciprof mmerlrpiston 3 catiyeiy to 1 more the againstQthe shankfofthe vy 4, but. yalso actsl initially'to A"advance the. tool toward'. the'work'anclv 'hold' the drill forcibly pressed a gaist'l the, I' Sameherein l have provided "a ,feeding-cylinder; 5

adapted to coperatie with a suitable'feeding' pistonv 6 containedtherein. y, l'Either the r pistter bit or drill while the tool is VPRESSURE-FED y TooL.

Patented aug. i7, 1ere..

. appiicationaieanayis,1909.. seria1No.496,256.

ton or cylinder as 4desired may be connected to 'the tool, the remainingpart serving to support they apparatus elther by abutting `against awall or other support (as in Fig.

1 or by direct attachment to some Xed object. In the present instancethe cylinder 5 is secured to the tool to move therewith on ,the piston,the latter having the piston rod 7 which projects through the plug 8fixed in the rear end of the cylinder and provided with a foot orpointed end adapted to Secure a rm hold in the rock.

rIn the present form of japparatus the pressure Huid for actuating boththe feed and the tool is controlled by means of a throttle valve 9, suchvalve being mounted in a sleeve or casing 10 apart from and eX- teriorto the connecting piece or head block l1, which latter is interposedbetween and rigidly secured to the feed cylinder 5 and the tool cylinder1.

The connecting piece or head block v11 is brought into firm, Irigidconnection with the feed ycylinder' and tool by means of tie bolts 12provided with suitable nuts, which bolts serve to draw together theclamping collars 13 and 14. The collars are provided with .interiorlytapered seats engaging the flared or tapered walls 15 and 16,respectively, formed on the tool cylinder 1 and the feed 'cylinder 5.The forward end of the feed cylinder 5 by this means is drawn up rigidlyover a reduced projecting portion 17J on the. connecting piece, lWhilethe rear end ofthe hammer drill is drawn snugly into a shell 18 formedat the opposite end of the connecting piece.

he forward collar 13 is provided with a motive iiuid for the tool, thelatter is held Seatedwithin the sleeve 10 by the threaded tapered Vplugy20, which latter'has a central fluid admission passage 21 and isconnected' with the feed pipe 2 by means of the nipple 22, a hose linethrottle valve 23 of ordinary construction being preferably employedinthe pipe 2 between the source of supply andthe apparatus. At itsopposite formed in the outer face of the sleeve 10 vand receiving a vpin27 carried by the inner face of the handle. Toposition the valve in thevarious positions 'to which it will be customarily turned while, at thesame time,

permitting graduated movement thereof, suitable means are employed, suchas the spring'catch '28 carried by the inner face of the handle andadapted to engage any one of a series of'depressions29 formed atsuitable intervals in the face of the sleeve, Within the sleeve there isalso provided an annular lubricating chamber 30, the details of which,however, 'formingnoi part of the present invention, are not hereinshown.

From the'admission aperture 2l pressure Huid enters a chamber 31 med inthe cupshaped end of the thrott e Valve 9, the latter being providedwith a pair of radial ports 32 and .33 adapted to control the pressurelluidfor the feed cylinder and the tool, respectively. When the valve isturned these parts are brought into or out of registration with passages34 and 35, respectively, which are formed lengthwi y,fthe laterallyextending stem piece 36, the llatter attached to or formed integrallywith fthe sleeve 10. The. connecting piece or head block is suitably!formed to receive the stem piece 36, the latter being secured in thehead block by fits tapered threaded end 38 and the nut lock 39.

i' When the valve 9 is turned to bring the radial port 32 intoregistration withzthe passage "34, pressure fluid is admitted -throughthe-said passage to the feed passage 40, which leads throughthe-headblock to the feed cylinder,` and the latter -is thereby forced'forwardly or outwardly on the piston'. Likewise, when the valveispositioned to bring the radial port 33 into registration with thepassage 35, pressure fluid is ad mitted through the toolv admissionpassage 41 to the constant pressure chamber. 42 of lthe hammer? drill,causingactuation f the same. The particular construction of the hammerdrilland its controlling valve is of no essential "importance, and thedetails thereof are not shown, it'being understood that any suitable,form of tool fn'ay be em- `ployed, such, for example, as that shown inmy prior Patent No. 902,288.

To place the feed cylinder in communication with the atmosphere, whendesired, suitable means are provided, such as a duct or passage 43 (seeFig. 4) extending laterally through the walls of the sleeve and adaptedto be laced in communication with the feed 55 cyln er passage 34 in acertain position of the valve by means of a groove or pocket 44 on theside of the valve, such groove being shown in Fig. 4. In this osition ofthe valve, which may be regarde as its central or inoperative position,the port 33 is shut olf from the tool admission passage, and the feedingcylinder being opened to the atmosphere, the apparatus 1s in itscontracted state with the tool' out of operation. The 75 port 32 is ofgreateri angular extent than the port 33as will be clear from Figs. 3and 4, so that, when the valve is moved farther to the left (as viewedin Figs. 3 Iand 4), or

in the direction of the arrow, the feed cylinsu der port will beslightly opened inadvancef of the tool admission port. This is 4thesecond position ofi the valve, and in this position the tool maybe'advanced slowly toward the work to position the drill by t initialfessure liuid admitted to the clyl'linder. t the same time, the atmoseric passage 43 is cut oil' from the feed cy inder. With the tool thuspositioned it is then usual to start the hammer ently in operation tospot the hole' before ull pressure is turned on to the tool. From theposition described the throttle Pmay be turned either to the'fullforpurposes of repair or for other reasons,.- but relieves the va ve ofmuch. of the vibrationftransmitted to those arts of the head block whichare in direct lne with the tool. Moreover, bein arranged, as it is inthe form illustrate parallel although out 4of line with the axis of thetool, such vibration as is imparted thereto has little effect in wearingthel seating surface of the valve. As shown it is virtually a part ofthe hose line or constitutesan extension thereof.

While-I have herein shown and described for the purpose of illustration,one concrete form or embodiment of my invention, it is to be understoodthat the same is not limited to the details of construction, or relativearrangement of parts, or tothe application l herein made of the variousfeatures thereof, but that the same may be modified within wide limitswithout departing from the spirit of my invention.

Having thus described my invention, what I claim is: Y

..Lln a 'tool feeding apparatus, the comb1nat1on with apressure-actuated tool of a pressure actuated feeding device therefor eslight 35 I block,

' a connecting member between the comprising a fixed and amovable memberand a single`throttle valve diiferenl tially controlling said passages,said throttle valve being located outside the connecting member and inthe hose line connection.

2. In a tool feeding apparatus, the combination with a pressure actuatedtool of a pressure actuated feeding device therefor comprising acoperating feeding cylinder and piston, one fixed and the othermovable,-

a headblock uniting the tool and feeding device, said movable feedmember, headblock-and tool constituting a movable unit, and a singlethrottle valve for the tool and feeding device located upon said movableunit but exterior to the headblock and having its axis yparalle with theaxis of the tool.

i 3. In a tool-feeding apparatus, the combination with apressure-actuated tool, of a pressure-actuated feeding device therefor,a headblock uniting the feeding device and tool, a sleeve memberexterior to the heada stem for the sleeve member extending into theheadblock and provided with passages leading from the sleeve member to lblnation with a pressure-actuated vnation with a pressure-actuated thefeeding device and tool, and a throttle valve in said sleeve memberadapted in one position to admit pressure fluid to the feeding device,and in another position to admit pressure fluid both to the feedingdevice and to the tool.

4. In a tool feeding apparatus, the comtool of a pressure-actuatedfeeding de'vice therefor comprising a fixed and a movable member, aconnecting member between the feeding device and tool, said fixedmember, connecting member and tool constituting a movable unit, a valveexterior to said connecting member but connected to and movable withsaid movable unit, a memberl connecting the yvalve and the connectingmember and provided with two passages leading through the connectingmember to the tool and feeding device, respectively, said passages beingcontrolled by said valve to admit pressure fluid tothe feeding device inone position and in another both to the feeding device and to the tool.t

5. In a tool-feeding apparatus, the combitool of a feeding piston and afeeding cylinder therefor, one fixed and the other movable, a connectingmember between the tool and the movable feed member, said connectingmember being provided with passages leading in t mg device and oppositedirections to control independentlyV the feed and the tool, a removablestem projecting from the connectingmember4 and provided with passagesconnected with. said passages in the connecting member, a casingexterior tothe connecting member to which the stem is connected', andaytlve in said casing controlling. said passages.y

6. In a tool feeding apparatus, the combination with pressure-actuatedfeeding device therefor comprising a coperating feeding cylinder andpiston one fixed a headblock uniting -the tool and feeding devices andprovided with passages lead;

ing in opposite directions, respectively, toY

the tool and feeding device, said movable feed member, headblock andtool constituting a movable unit, and a single throttle valve for thetool and feeding device and controlling the passage of pressure fluidthrough said oppositely leading passages, said valve being locatedupon.said headblock but exterior thereto, said valve being adapted in oneposition to admit Huid pressure to the passage leading to the feedingdevice and in another position to admit fluid both to thepassage'leading to the feedto the passage leading to the tool.

7. In a tool feeding apparatus the combination with a pressure-actuatedtool of a pressure-actuated feeding device'therefor comprising a fixedand a movable member, a connecting member between the tool and themovable member having passages leading in opposite directio to the tooland the feeding device resptively, said movablelmember, connecting,member and tool constituting a movable unit, a hose line, a hose lineconnection attached to said connecting member and a single throttlevalve controlling said passages, said throttle valve being locatedoutside the connecting member and in the hose line connection, saidvalve in one position being adapted to admit pressure fluid to thepassage leading to another position to admit pressure fluid both to thepassage lea-ding to the feeding device and to the opposite passageleading to the too 8. In a tool feeding apparatus, the combination witha pressure-actuated tool of a pressureactuated feeding device thereforcomprising a coperating feeding cylinder and piston, one fixed and theother movable, a headbloclr uniting the tool `and feeding device, saidmovable feed member, headblock and tool constituting a movable unit, anda single throttle valve forthe tool and feeding device located upon saidmovable unit but exterior to the headblock and having its axis parallelwith the axis of the a pressure-actuated tool of a and the othermovable,

the feeding device and in tool, said headblock having passages lea-'1.-name to this specification; in the presence of ing in oppositedirections to the tool and two subscribing Witnesses. feeding device andsaid throttle valve being GEORGE H. GILMAN.

adapted to independently control the pres- Witnesses: sure Huid throughsaidv assages. J. A. BRUCE,

In testimony whereo I have signed my A. E. DonsEY.

copies of this instelt may be obtained for ve cents each,J byraddressingl the Commissioner of Patents.

` Washington, D. 0."

